Rotary oil burner



May 30, 1933- L. s. cHADwlcK Er AL 1,911,264

ROTARY OIL BURNER 4 Sheets-Sheet l Filed July 27, 1929 MMMMM www May 30,1933. s, cHADwlcK ET AL 1,911,264-

ROTARY OIL BURNER Filed July 27, 1929 4 Sheets-Sheet 2 gwumatow /L/QQW 4Sheets-Sheet 3 L. S. CHADWICK El' AL ROTARY OIL BURNER Filed July 27,1929 May 30, 1933.

May 30, 193.3 L. s, cHADwlcK r AL 1,911,264

ROTARY OIL BURNER 4 Sheets-Sheerl 4 Filed July 27, 1929 Patented May 30,1933 UNITED STATI-:s

PATENfn ol-luca LEE S. CHADWICK, OF'SHAKER HEIGHTS VILLAGE, 'MARC BESEK,OF CLEVELAND HEIGHTS, AND JOHN ALGER DAHLSTROM, F BAY VILLAGE, OHIO,ASSIGNOBS T0 vIEEIRIEII'.CTION STOVE COMPANY, OF CLEVELAND, OHIO, A.GOBPOMTION OF OHIO ROTARY OIL BURNER Application mea :my 27,

Aare to simplify, cheapen and improve oil burners of the type referredto.

Another object is to provide a very substantial and compactvstructurethat is selfcontained to the 'inclusion of motor and hearth and that isdesigned to be placed in the lower portion, as in the ash it, of afurnace of standard type with the earth so located with respect tothefrebox that maximum efficiency is obtained. p

A further object of the invention is to provide a rotary oil burner thatis es ecially quick and convenient of installation, 1t being unnecessarywith our improved burner to close any opening or space that is leftbetween the hearth of the burner and the wall of the furnace, inasmuchas the lower portion of the furnace below the hearth is closed to theadmission 'of superfluous or excess air by a proper emplacement of theburner, the air necessary for the promotion of combustionlenteringthrough a part of the burner structure.

In line lwith the foregoing are the further objects of providing simpleand easily o erated means for regulating the air supp y to the burner,and the designing of the burn- `er so that the air admitted forcombustion purposes is utilized to prevent overheating of the parts ofthe apparatus, especially the motor.

A still further object of the invention is to provide a constructionthat is made up largely of sheet metal stampings, thus maintaining thecost of production relatively low by eliminatin much machine work,insuring proper fittlng of the parts together, along with uniformity ofproduct and lightness of structure. Also, the sheet metal, being ofrelatively small mass, dissipates the heat rapidly thereby keeping theburner parts comparatively cool.

These, and other objects that will appear as the description-proceeds,are attained in in number, with the hearth 3 dispos 1929. Serial N0.381,800.

the embodiment of the invention illustrated in the accompanying drawingswhereinFig. 1 is a central vertical section from front to rear throughour improved oil burning apparatus and the adjacent part of the furnacein l which it is installed, the oil reservoir and atomizing cup, withthe latters associated parts, being shown in elevation; Fi 2 and 3 arehorizontal sections through t e apparatus on the respective lines 2-2and 3--3 of Fig. 1; Fig. 4 is a central vertical section through theupper portion of the apparatus on a scale considerably enlarged overthat of Fig. 1, the present view showing the oil reservoir, atomizingcup, and parts associated therewith, rin section; Fig. 5 isa'*horizontal section, substantially on the line 5-5 of Fig. 4, thescale of this and the following figures being somewhat reduced withrespect to that of Fig. 4; Fig. 6 is a section substantially on the line66 of Fig. 4; and Fig. 7 is a sectional detail on the correspondinglynumbered line of Fig. 5. i

The furnace, the lower vportion of which is shown in Fig. 1, isdesignated A, and the same is of standardtype and construction andaccess is had to the ash pit al thereof through the usual openin a. Thebottom ofthe ash pit is shown as ormed by theioor a2, and above' the ashpit is the iirebox or combustion chamber designated a".

Our improved burner consists of three major parts which may be referredto, generally, as the lower or bottom unit assembly 1, the upper or topunit assembly 2, and the hearth 3. Thestructure comprising these majorparts is supported a suitable distance above the floor a2 by legs 5,preferabl three4 in the lower portion of the rebox or combustion chamberas.

The lower unit assembly 1 is made up of a circular bottom wall 6, acylindrical wall 7 and an annular top wall 8. The bottom wall is dishedthroughout its central portion, as shown at 9, and is surrounded by aflange 10, .while the top wall 8 is formed with a peripheral flange 11'.The top and bottom edges of the cylindrical wall 7 are spot welded orotherwise secured to the flanges of the respective walls 8 and 6. Forconvenience of assembly, the front portion of the cylindrical wall 7 ismade removable, as best disclosed in Figs. 2 and 3, said portion beingdesignated 12, and shown as 'held in place by thumb screws 13. Thepreviously mentioned legs 5 are preferably'threaded through thimbles 14whose upper ends are reduced and riveted within openings in the bottomwall 6. By reason of this construction, the legs 5 are 'adjustable withrespect to the structure so that the latter may be made levelnotwithstanding irregularities in the floor a2.

' The inner end of an air supply conduit 15, shown as formed oftelescoping sleeves, is fitted through an opening in the front portion12 of the cylindrical wall 7 of the bottom unit assembly 1, the forwardend of said conduit projecting through a collar 16 that is applied to aplat-e 17 over an opening 18 therein, and which plate closes the ash pitopening a of the furnace. An air control damper 20 is adjustablyconnected to the front of the air supply conduit 15 as by means ofslotted tongues 21 through 'which bolts 22 are engaged, said boltsextending through apertures in the outer sleeve of the conduit 15- (andthe upper one through a hole ina bracket'23) beyond which they areprovided with Wing nuts 24. The bracket 23 is in the form of an angleWhose inner branch bears against the collar 16 and, therewith, isconnected to the plate 17 by a screw 25. The inner-end of the air supplyconduit cngages a stop 26 that is fastened to the removable portion 12of the wall 7. A cylindrical wire screen 27 is connected to and isadjustable with the air control damper 20 and extends into the conduit15 for preventing the entrance of foreign matter with the air.

An electric motor 30 is suspended, lthrough bolts 31, from the annulartop wall 8 of the,

lower unit assembly 1, the casing of the motor having a circularextension 32 that fits within the opening of said annular wall. Themotor shaft 33 extends a material distance above the wall 8 and has inits end a transverse notch 35, the upper portions of whose side Wallsare flared outwardly, as shown at 36. According to prevailing practice,a dust cover 37 is fitted to the shaft 33 adjacent a boss 38 of themotor casingwherein said shaft has bearing.

The top unit assembly 2 includes a pan like housing whose body portionis drawn from sheet metal to form a bottom 40 and a side wall 41. Theupper edge of said wall is flanged outwardly at 42, and suitably securedthereto is the periphery of a. top 43, the central portion of which isofi'set upwardly to form a cylindrical extension 44. Said extension hasformed integral with it an annular wall 45 that surrounds an opening 46.

The hearth proper is made of suitable refractory material, such asfireclay or brick, and the same includes a rim 48 that rises from theedge of a flat bottom wall 49, and this refractory body is containedwithin a sheet metal hearth receptacle 50 that is supported by the top43 of the upper unit assembly 2. The hearth receptacle is shown assecuredv to said top 43 by screws 51 Whose heads are accommodated by acavity in the bottom wall 49 of the hearth.

Situated centrally, and secured to the bottom 40, of the aforesaidhousing that constitutes a part of the upper unit assembly, is areservoir 55 to which fuel oil is conducted through a supply pipe 56. Itmay be explained that by suitable means (not shown),

I such as a float control, or an overflow device,

like that disclosed in our above mentioned application, the oil ismaintained at about the level indicated by the like a: in Fig. 4. Itwill be noted that the bottom of the reservoir is formed with areentrant portion 57 that rises to almost the height of the peripheralWall, and applied to said peripheral wall is a dust guardv 58. A bailie59 rises from the bottom of the reservoir in concentric and spacedrelation to the reentrant portion 57 and the same has a series of holes59a adjacent its lower end through which the oil spaces Ainwardly andoutwardly of the baiiie communicate. The aforesaid'reentrant portion 57constitutes an air flue, as will hereinafter appear.

Dipping into the reservoir below the normal oil level therein, andinside the baflie 59, is the receiving end 60 of an 'atomizing cup 61that is supported through a disk-like member 62 from a head 63 thatincludes an elongated hollow hub 64 that lits over the motor shaft 33, apin 65, that extends transversely through the hub, occupying the notch35 in the motor shaft. By this means a driving connection is effectedbetween the atomizing cup andmotor shaft which is readily established bysimply lowering the cup in place,

the upwardly fia-red Walls 36 of said notch.

-It will be noted, especially from Figs.y 4 and 6, that the supportingmember 62 is provided with a series of openings 66 that overhang theshoulder 67 that. is formedibetween the enlarged upper end of theatomizing cup and the receiving end 6() thereof. The receiving end andbowl of the cup are upwardly divergent and the latter is flaredoutwardly at its upper or discharge end to provide a lip 68. Surroundingthe receiving end of the cup, a short distance above the baiiie 59, isWhat we shall term an oil slinger 69 Whose function it is to arrestupward How of oil about the exterior of said end of the cup and returnit to the reservoir, thus preventing its escape into the housing of thetop unit assembly.

To protect the interior of the atomizing cup from the intense heat ofthe products of combustion in the irebox a3 of the furnace, a so-calledcooling bell occu ies the cup, and said bell has a cover` 71 wliichextends a material distance beyond its periphery and is of considerablygreater diameter than the atomizing cup. A ring 72 is spaced below theoverhangmg portion of the cover 71 and is connected thereto by fasteningmeans 7 3, a Ventilating space 74 being thus provided between said ring72 and the edge portion of the cover 71. The bottom of the bell 70 isspaced from the supporting member 62 by thimbles 75, and said thimbleshave threaded bores for the reception of screws 76 that secure the belland the supporting member 62 to the head 63. Rivets 77 connect the edgedportion of the supporting member 62, the shouldered portion 67 of theatomizing cup, and a ring 78 together, said ring, in turn, havingsecured to its peripheral portion, as by rivets 79, a shell 80 whichextends upwardly about the atomizing cup and immediately below the lip68 thereof is equipped with radial fan blades 81.

The bottom and top unit assemblies 1 and 2 are secured together byscrews 85, and the portions of their respective walls 8 and 40 that arein engagement with each other are provided with large registeringopenings 86, as best shown in Figs. 5 and 7. The wall 8 has smalleropenings 87 immediatel adjacent the motor casing and throug thesesmaller openings the interior of the bottom unit assembly communicateswith a space 88 provided by the elevated central portion of the wall 40.It will be noted that the central opening of said wall 4() isapproximately of the same diameter as the reentrant portion 57 of thereservoir 55, and that the top of said reentrant portion is open to theinterior of the receiving end 60 of the atomizing cup. The purpose ofthis will later appear.

A pilot burner 90, preferably a gas burner, is located within the lowerfront portion of the hearth 3 and the same is connected to a gas supplyline 91 that includes a mixer 92 through which primary air is admittedto the burner. The line 91 is shown as including also a dirt trap 93.

Current is supplied to the motor 30 through suitable conductors (notshown) and when said motor is energized it Whirls the atomizing cup at arelatively high rate of speed, the direction of rotation being from leftto right as the parts are viewed in Fig. 1. By reason of the gradualupward divergence of the receiving end and bowl of the cup, the oil,through centrifugal action, is caused to travel up the receiving end ofthe cup, through the openings 66, and upwardly across-the inner surfaceof the cups bowl in a thin film to the discharge end or lip 68 fromwhich it is hurled outwardly in a spray or unit assembly about the motor30, through the holes 87, space 88, the interior of the reentrantportion 57 of the oil reservoir and through the same openings 66 of thesupporting memberthrough which the oil rises into the bowl, and themajor portion of this air that rises through the cup, is hurledoutwardly and intermixed with the oil, while the remaining part passesout through the ventilating space 74 between the ring 72 and theoverhanging edge portion of the cover 71 to properly ventilate thesame.A Additional air is drawn upwardly through the relatively largeopenings 86 and through the houslng of the top unit assembly and out byway of the central opening 46 in the upwardly extended portion of thetop wall 43. In other Words, the fan comprising the blades 81 acts toinduce a draft of air upwardly through the oil reservoir, the interiorof the cup and the Ventilating space of the cooling bell, and a seconddraft of air upwardly about the exterior lof the reservoir and atomizingcup. This entraining of the air about the burner parts has the tWoadvantages: first, that of maintaining the burner parts relatively cool;

and, secondly, that of preheating the air so that it will have avaporizing effect upon the fuel oil. Thus, in our improved burner, theoil is not only atomized by mechanical means, but vaporized by thermalaction. Immediately after the motor is started and the oil and air arehurled outwardly into the conlines of the hearth, the combustiblemixture is ignited by the pilot burner 90 and is deflected upwardly bythe rim of the hearth.

By forming the rim of the hearth with the groove 48a in the plane of thedischarge end or lip 68 of the atomizing cup, so that the mixture of oiland air is hurled into said groove, a Aturbulence is set up that greatlyenhances combustion, rendering it practically complete.

The air supply may be varied in order to .obtain the most elficientmixture and a satisfactory flame by the adjustment of the air controldamper 20, in the manner hereinbefore described.

An lmportant fcaturc of our improve` ments is the use of so-calledystainless steel-which is an alloy, largely of iron, having a chromiumcontent of from 10% to` 20%-for the cooling bell 70, and mol'eespecially for its cover 71. low heat conductivity, low heat capacity,and high heat resistivity. 'lhese qualities make it peculiarly suited toour purpose.

Having thus described our invention, what we claim is:

1. In oil burning apparatus, the combina- This metal is of Larnaca tionof an oil container surrounding an air flue, an atomizing element havinga hollow upwardly diverging receiving end dipping into the containerabout said air flue, means for rotating the atomizing element, and a fanassociated with said element.

2. In oil burning apparatus, the combination of an oil containersurrounding an air flue, an atomizing element having a hollow upwardlydiverging receiving end dipping into the oil container about said flue,a centrifugal fan associated with the atomizing element, and means forrotating the atomizing element and fan.

3. ln oil burning apparatus, the combination of an oil container,driving mechanism below the same, the Container having its bottom formedwith an elevated portion provided with an aperture, an atomizing elementhaving an upwardly diverging receiving end dipping into the container, afan associated and operating withsaid element for drawing air upwardlythrough said aperture, and driving connections between said element andthe driving mechanism passing through said aperture.

a. lin oil burning apparatus, the combination of a reservoir having itsbottom formed with 'a reentrant portion provided with an air-emittingopening at its top, an atomizing element having va hollow upwardly'diverging receiving end dipping into the reservoir about said reentrantportion, and means for rotating the atomizing element.

5. ln oil burning apparatus, the combination of a reservoir having itsbottom formed with a reentrant portion that is provided with anair-emitting opening at its top, an atomizing element having a hollowupwardly diverging receiving end dipping into the reservoir about saidreentrant portion, a centrifugal fan associated and rotatable with theatomizing element, and means for rotating the atomizing element.

6. ln oil burning apparatus, the combination of a reservoir having itsbottom formed with a reentrant portion that is provided with an airemitting opening at its top, an atomizing element having a hollowupwardly diverging receiving end dipping into the reservoir about saidreentrant portion, a fan associated and operating with said element, andmeans extending upwardly through said reentrant portion for rotating theatomizing element.

7. 1n oil burning apparatus, the combination of a reservoir having itsbottom formed with a reentrant portion that is provided with.

an air-emitting opening at its top, an atomizing element having a hollowupwardly diverging receiving end dipping into the reservoir about saidreentrant portion, a baille within the reservoir surrounding thereceiving end of the atomizing element, and means or rotating theatomizing element.

with an air-emitting opening at its top, an

atomizing element having a hollow upwardly diverging receiving enddipping into the res'- ervoir about said reentrant portion, a bame lwithin the reservoir and surrounding the re ceiving end of the atomizingelement, and means extending upwardly through said -reentrant portionfor rota-ting the atomizmg element.

9. in oil burning apparatus, the combination of a reservoir having itsbottom formed with a reentrant portion th at is provided with an openingat its top, an atomizing element having a hollow upwardly diverging'receiving end depending into the reservoir about said reentrant portion,a baffle within the reservoir surrounding and spaced from the receivingend of the atomizing element, an oil slinger carried by the receivingend of the atomizing element and overhanging the upper end of thebaille, and means for rotating the atomizing element.,

l0. in oil burning apparatus, the combination of an open-top reservoirsurrounding an air flue, an atomizing cup whose peripheral wall mergesinto an integral depending and upwardly diverging sleeve-like extension,a perforated bottom set within the cup at its junction with saidextension, means connected to'said bottom for rotatably supporting thecup with said extension in the reservoir, a fan associated and operatingwith said cup, and means for rotating the atomizing cup.

l1. ln oil burning apparatus, the combination of an open-top reservoirhaving its bottom Jformed with a reentrant portion that is also open atthe top to provide an air emitting opening, an atomizing cup formed withan upwardly diverging sleeve-like receiving end that extends into th-ereservoir about said reentrant portion, draft inducing means as-Sociated and operating with said cup, and rotating means extendingupwardly through the reentrant portion of the reservoir and havingdriving connection with the atomiz# ing cup.

12. In oil burning apparatus, the combination of an open-top reservoirhaving its bottom formed with an open-top reentrant portion providing anair flue, an atomizing cup formed with an upwardly diverging sleevelikereceiving end, a supporting member sustaining the cup with its receivingend in the reservoir about said reentrant portion, draft inducing meansassociated and operating with said cup and rotating means extendingupwardly through the reentrant portion of the reservoir and havingdriving connection with said supporting member.

13. In oil burning apparatus, the combination of an open-top reservoirhaving its bottom formed with a reentrant portion that is tion providingan air flue, a drive shaft disposed axially of said reentrant portion,an

atomizing cup formed of sheet metal and comprising a bowl and areceiving end there below that is of lesser diameter than the bowl lthereby to form a shoulder between said said drive shaft, draft inducingmeans associated and operating with said cup, and driving connectionsbetween said hub member and said shaft.

l5. In oil burning apparatus, the combination of a rotatably supportedatomizing cup,

e a fan surrounding said cup and rotatable therewith, a cooling bellwithin the cup and spaced from the bottom and peripheral wall thereof, acover for said bell extending outwardly over the fuel discharging lip ofthe cup, and a ring supported below and in spaced relation to the edgeportion of said cover.

16. In oil burning apparatus, the combinationl of top and bottom u nitassemblies consiting of intercommunicating casings, a Inoto supportedwithin` the bottom unit assembly with its shaft projecting upwardly intothe top unit assembly, the top Wall of the latter assembly having anopening in line with the motor shaft, an annular oil reservoirsurrounding an air flue and situated Within l the top assembly about themotor shaft, an

atomizing Vcup arranged within the opening of said top wall with itsdischarging end above the' same and its receiving end extending into theoil reservoir, fan blades surrounding the cup and rotatable therewith,driving connections between the atomizing cup and the motor shaft, andmeans for admitting air to the bottom unit assembly, said air, by theaction of the fan blades, being entrained upwardly about the motor, apart of said air passing through the casing of the top unit assembly andoutwardly through the opening in the top Wall thereof, and a partthrough the aforesaid air flue.

17 In oil burning apparatus, the combination of top and bottom unitassemblies consisting of intercommunicating casings, a motor supportedwithin the bottom unit assembly with its shaft projecting upwardly intothetop unit assembly, the top wall of the latter assembly having anopening in line with the motor shaft, an annular oil reservoirsurrounding an air flue and situated withinthe top assembly about themotor shaft, an atomizing cup arranged within the opening of said topWall with its discharge end above the same and its receiving endextending into the oil reservoir, fan blades surrounding the cup androtatable therewith, driving connections between the atomizing cup andthe motor shaft, means for admitting air to the bottom. unit assembly,said air, by the action of the fan blades, being entrained upwardlyabout lthe motor, a part of said air passing through the casing of thetop unit assembly and outwardly through the opening in the top wallthereof and a part through the aforesaid air flue, and an air controldamper for regulating the amount of air admitted to the bottom unitassembly.

18. In oil burning apparatus, the combination of upper and lower unitassemblies consisting of intel-communicating casings, driving mechanismWithin the lower unit assembly, the top wall of the upper assemblyhaving an opening, an annular oil reservoir surrounding an air flue andsituated within the upper unit assembly, an atomizing cup arrangedWithin the opening of said wall with its discharge end spaced above saidwall and its receiving end extending into the oil reservoir, drivingconnections between the cup and said mechanism, a centrifugal fancarried by the atomizing cup and having its blades disposed between thedischargev end of the cup and said top Wall whereby its action will drawair through said air flue and through the opening in the top wall of theupper assembly, means for delivering fuel to the reservoir, and an airsupply conduit leadin into the bottom unit assembly.

19. n oil burning apparatus, the combination of top and bottom unitassemblies consisting of intercommunicating casings, legs adjustablyconnected to the bottom unit assembly for supporting the same, drivingmechanisin within the bottom unit assembly havin a shaft extendingupwardly into the top unit extending into the oil reservoir, acentrifugal fan carried by the atomizing cup and having its bladesdisposed between the discharging lend of the cup and saidxtop wall, acover eX- tending over the cup and projecting outwardly over the fanblades, means for delivering fuel to the reservoir, a hearth surroundingthe upper portion of the top unit assembly in operative relation to theatomizing cup,

an air supply conduit leading into the bottom unit assembly, and an aircontrol damper adjustable with respect to the outer end of the airsupply conduit for regulating the amount of air admitted through saidconduit, the air admitted through the action of the centrifugal fanbeing entrained upwardly about the motor and about the oil reservoir andthrough the aforesaid opening about the atomizing cup.

20., ln a rotary oil burner, the combination of a motor so positionedthat its shaft projects upwardly, an annular oil reservoir surroundingand spaced radially from the upwardly projecting motor shaft thereby toprovide an air izing cup arranged with its receiving end in the oilreservoir, said cup being operatively connected to the motor shaft, anddraft inducing means associated and operating the said cup.

2l. ln a rotary oil burner, the combination of a motor arranged with itsshaft vertical, an annular oil reservoir surrounding oand spacedradially from the upwardly projecting motor shaft thereby to provide anair flue about the same, an atomizing cup supported by the motor shaftwith its receiving end dipping into the oil reservoir, and draftinducing means associated and operating with said cup.

22. In a rotary oil burner, the combination of a motor so positionedthat its shaft projects upwardly, an annular oil reservoir surrounding`the upwardly projecting inotor shaft, an atomizing cup arranged with.its receiving end in the oil reservoir, operative connections betweenthe motor shaft and cup., and a baie in the reservoir surrounding andspaced from the receiving end of the c up..

23. In a rotary oil burner, the combniation of a motor so positionedthat its shaft projects upwardly, an annular oilreservoir surroundingthe upwardly projecting motor shaft, an atomizing cup arranged with itsreceiving end in the oil reservoir, operative connections between themotor shaft and cup, a balile in the reservoir surrounding and spacedfrom the receiving end of the cup, and an oil slinger carried by the cupabove the ballie.

24. In a rotary oil burner, the combination of a housing having anopening in its top, a motor supported in the housing with its shaftvertically disposed, an annular oil reservoir surrounding the upwardlyprojecting motor shaft, an atomizing cup arranged with its discharge endabove the housing and its receiving end in the oil reservoir, a fansurrounding and rotatable with the cup, and operative connectionsbetween the cup and 'motor shaft, said fan acting to draw air throughthe housing and induce a draft upwardly through the oil reservoir andthe interior of the cup 'and a second draft upflue about the saine, anatomanimee wardly about the exterior of the reservoir and cup,

25. lln a rotary oil burner, the combination of a houshing having anopening in its top, a hearth surrounding said' opening, a motorsupported in the housing with its shaft vertically disposed, an annularoil reservoir surrounding and spaced radially from the upwardlyprojecting motor shaft thereby to provide an air flue about the same, anatomizing cup arranged with its discharge end above the hearth and itsreceiving end in the oil reservoir, a fan surrounding and rotatable withthe cup above the housing, and. operative connections between the cupand motor shaft.

26. In a rotary oil burner, the combination of a housing having anopening in its top, a motor supported in the housing with its shaftvertically disposed, an annular oil reservoir surrounding the upwardlyprojecting motor shaft, an atomizing cup arranged with its discharge endabove the housing and its receiving end in the oil reservoir, a coolingbell arranged in a position to protect the interior of the cup from theheat of the products of combustion, said bell having a Ventilatingspace, a fan surrounding and rotatable with the cup, and operativeconnections between the cup and motor shaft, said fan acting to induce adraft of air upwardly through the oil reservoir, the interior of the cupand the Ventilating space of the cooling bell and a second draft of airupwardly about the eX- terior of the reservoir and atomizing cup.

In testimony whereof, we hereunto aiix our signatures.

LEE S. CHADWICK.

MARC RESEK. JOHN ALGER DAHLSTROM.

auy

